• Terik Daly

    Postdoctoral Fellow

    Planetary Exploration Group

    Johns Hopkins Univeresity Applied Physics Laboratory

  • By the numbers

    Numbers can't capture the essence of a person, but people use them anyway...


    Peer-reviewed papers


    Years teaching experience


    Conference presentations


    Year-long teaching certificates

  • Terik's Research

    Many people who studying impact craters focus on the physical consequences of impact: how craters form, why they look the way they do, and how cratered landscapes evolve with time. My work is different. In addition to considering the physical consequences of impact, I explore the geochemical consequences of impacts. This focus allows me to study big-picture questions, such as how Earth got its water.


    I focus on fundamental processes rather than a specific moon or planet. However, to date I have worked on problems related to the asteroid Vesta, dwarf planet Ceres, and our very own Earth. Scroll down to learn about a few of my recent projects.




  • Impactor Contamination of Ceres

    Hypervelocity impact experiments, coupled with scaling calculations, predict extensive impactor contamination on Ceres. We explore how the bulk composition of Ceres affects the character of projectile remnants.


    Published in Geophysical Research Letters as "Predictions for impactor contamination on Ceres based on hypervelocity impact experiments".


    Click here for the press release. This paper was also featured in Eos.

    Impactor Debris on Vesta

    My coauthors and I show that that Vesta accretes large quantities of meteoritic debris, largely hosted within the glassy melt breccias. The experiments at the core of this work, which were performed at the NASA Ames Vertical Gun Range, provide insight into how dark material is delivered to Vesta and reveal the physical state of the projectile component.


    Published in Icarus as "Delivering a Projectile Component to the Vestan Regolith".

    Meteoritic Fingerprints in Terrestrial Craters

    During impacts on Earth, tiny amounts of the impacting asteroid or comet can be mixed into melted Earth rocks. We can sniff out these tiny "fingerprints" using geochemical tools like osmium isotopes. In collaboration with colleagues at the UT Austin and the University of New Brunswick, we used osmium isotopes to search for meteoritic signatures in impact melt rocks from two Canadian craters: East Clearwater and West Clearwater. The results surprised us!


    Presented at the Lunar and Planetary Science Conference and Brown University (manuscript in preparation).

    Water Delivery During Impacts

    We use hypervelocity impact experiments to measure how much water gets delivered by impacts. The answer? Up to half of the impactor's water is trapped in and near the crater under conditions typical of the main asteroid belt. Moreover, we show that this water is trapped in a combination of impact-generated glasses and impact breccias.


    Presented at the Lunar and Planetary Science Conference and GSA Annual Meeting (manuscript in preparation).

    A Novel Source for Dust Accelerators

    Current dust accelerators can only accelerate electrically-conductive particles. We show that electrospray charges minerals and astrophysical ices without the need for conductive coatings. This opens new avenues for experiments with realistic planetary materials, potentially transforming laboratory studies of cosmic dust.


    Published in Planetary and Space Science and Earth, Planets, and Space as "Electrospray charging of minerals and ices for hypervelocity impact research" and "A novel particle source based on electrospray charging for dust accelerators and its significance for cosmic dust studies​", respectively.

    Multi-Stage Image Charge Detectors

    I first encountered image charge detectors while working on my dust accelerator project. By the end of the project, I was quite familiar with these instruments. I collaborated with Brandon Barney and Dr. Daniel Austin on designs for multi-stage image charge detectors made from printed circuit boards. This approach is far easier than trying to machine and align multiple detection cylinders.


    Published in Reviews of Scientific Instruments as "A multi-stage image charge detector made from printed circuit boards".

  • Terik's Teaching

    I immerse students in hands-on exploration and authentic research experiences while implementing evidence-based strategies to help students of diverse backgrounds find academic success. You can read about my teaching philosophy here. In addition to teaching my own classes, I participate in workshops and teaching certificate programs. I also facilitate educational development workshops.

  • Courses

    Habitable Worlds

    Each summer I teach a week-long course for high school students entitled "Habitable Worlds: Possible Places for Life in the Solar System and Beyond". I designed the course and currently co-teach it with my friend and colleague Stephanie Bouchey. Our award-winning class engages high school students uses problem-based learning as the mechanism for catalyzing student engagement.

    Planetary Geology

    As the teaching assistant for an introductory course called "Planetary Geology", I solo taught one week of the class of the semester-long course and developed new homework assignments, in addition to typical TA responsibilities.

    Geology in the Real World

    In summer 2017 I am teaching a new course called "Geology in the Real World: Intersections Between Geology and Society". The course uses recent events to reveal how geology influences the lives of everyone on Earth. Students also explore how news and social media sites report on earth science issues.

  • Educational development

    Workshops facilitated

    In 2015 Stephanie Bouchey and I reenvisioned and implemented a practicum for TAs in the Brown University Department of Earth, Environmental and Planetary Sciences. The practicum combined "real world" experiences and mentoring as new TAs practiced leading discussions, evaluated real student work, and interacted with experienced TAs and faculty. I have since facilitated seven TA workshops.

    Teaching certificates

    I have completed or am currently completing three of the Sheridan Center's year-long teaching certificates, including Reflective Teaching, the Professional Development Seminar, and the Teaching Consultant program. I serve as a departmental graduate student liaison to the Center and on the Center's Graduate Student Advisory board.

    Instructional technology

    In 2016 I participated in Brown University's Institute for Teaching and Technology and the Facilitating Learning Online course offered by the Brown University School of Professional Studies. Each of my courses takes advantage of instructional technologies in one or more ways.

  • Terik's Outreach

    I share the latest in space exploration with the public and help K-12 students achieve science success.

    Ask an Expert

    I help K-12 students, parents, and teachers with their science fair projects via the online "Ask an Expert" mentoring forums. The "Ask an Expert" program is run by Science Buddies, a non-profit science education organization that reaches more than 17 million unique visitors annually.

    Second Grade Science

    I participate in a grad student-led science outreach program at the Vartan Gregorian Elementary School. Once a week we teach hands-on, NGSS-aligned lessons to second grade students. I design lesson plans and teach one to two times each semester.

    Data Center Open Houses

    The Northeast Regional Planetary Data Center hosts open houses at Brown University. I explain exhibits to visitors, answer questions, and share the latest and greatest in planetary science. Visitors range from pre-K to adult. I have participated in the following open houses: Comet Tales (2013), Exploration of Icy Worlds (2014), From Mars to Pluto (2015).

    Museum Exhibits

    I have contributed sections of planetary science-themed museum exhibits at the Museum of Natural History in Providence, RI and at the Northeast Regional Planetary Data Center. Exhibit titles: "Icy Worlds and the Discoveries of Dawn and New Horizons (2015)" and "From Mars to Pluto: Images from Curiosity, Dawn and New Horizons (2015)".

    Elementary School Workshops

    On behalf of of the Rhode Island Space Grant, I led standards-aligned, hands-on workshops at the Lawn School in Jamestown, RI. Students classes explored the scale of the Solar System.

    Public Library Events

    In 2014, the Johnston Public Library sponsored a summer science program for elementary school students. I crafted and led a hands-on session comparing our Solar System to the planetary systems around other stars.

  • Contact Terik